For a start, please read the Aximmetry documentation. If the scene scale seems wrong, you’ve either made the scene in Unreal at the wrong scale or you haven’t properly calibrated your lens and tracker To camera offsets. 

Thanks for replying, please how to solve the delay and up and down shaking, thanks again for the reply

Hi,

You probably need to set the tracking delay: https://aximmetry.com/learn/tutorials/for-studio-operators/latency-and-delay-in-aximmetry/#tracking-delay 

If the shaking still happens, can you show a video of it? Otherwise, it is very hard to figure out what is causing the shaking.

Warmest regards,